IOS CoreLocation在Xcode 9升级后停止工作

Question

我正在学习Swift和IOS编程。在升级到Xcode 9和IOS 11模拟器之前，我有这个骨架代码工作正常，但现在它根本不工作，我不知所措。我已经搜索了可能已经改变但没有想出任何东西的东西。我知道这很简单。

在应用程序的plist文件中，我设置了NSLocationWhenInUseUsageDescription键，因此它不会抱怨要求用户许可。该应用程序构建良好，并在模拟器上运行，但它永远不会打印任何位置信息，也不会给出任何错误。在模拟器中，我进入了Debug-＆gt; Location并设置了lat / long。

import WatchKit
import Foundation
import CoreLocation

var yourLongitude: Double = 0.0

class InterfaceController: WKInterfaceController, CLLocationManagerDelegate {

    var manager: CLLocationManager!
    var location: CLLocation!

    override func awake(withContext context: Any?) {
        super.awake(withContext: context)

        // Configure interface objects here.
        self.manager = CLLocationManager()
        self.manager.delegate = self;
        self.manager.desiredAccuracy = kCLLocationAccuracyNearestTenMeters
        self.manager.requestWhenInUseAuthorization()
        self.manager.startUpdatingLocation()
        //NSLog("Here")
    }

    func locationManager(_ manager: CLLocationManager, didUpdateLocations locations: [CLLocation]) {
        let locValue:CLLocationCoordinate2D = manager.location!.coordinate
        NSLog("locations = \(locValue.latitude) \(locValue.longitude)")
        yourLongitude = locValue.longitude
        printLongitude(yourLongitude)
    }

    func locationManager(_ manager: CLLocationManager, didFailWithError error: Error) {
        NSLog("Error with geolocation " + error.localizedDescription)
    }

    func printLongitude(_ longitude: Double) {
        var longitudeForLabel: String?
        if (longitude < 0) {
            longitudeForLabel = String(format: "%.03f", abs(longitude)) + "°W"
        } else {
            longitudeForLabel = String(format: "%.03f", longitude) + "°E"
        }
        LongitudeLabel.setText(longitudeForLabel!)
        manager.stopUpdatingLocation()
        //NSLog("Here")
    }

    override func willActivate() {
        // This method is called when watch view controller is about to be visible to user
        super.willActivate()
        manager.startUpdatingLocation()
        NSLog("app in foreground")
    }

    override func didDeactivate() {
        // This method is called when watch view controller is no longer visible
        super.didDeactivate()
    }
}